Validation fields before files upload

[ezequiel88]

Beautiful work! I would need to validate the other fields before saving the images to disk

class x {
    public async createAnimal(req, res, next): Promise<void> {

        const userId = response.locals.userId
        const form = formidable({ multiples: true })
        let fields: any = {}
        let files: any = []

        form.on('field', (fieldName, fieldValue) => {
            fields[fieldName] = fieldName === "vaccines" ? JSON.parse(fieldValue) : fieldValue
        })

        form.on('fileBegin', (formName, file) => {
            files.push(`public/images/animal/photo-${file.newFilename}.jpg`)
            file.filepath = `public/images/animal/photo-${file.newFilename}.jpg`
        })

        form.parse(request, ()=>{})

        form.once('end', async () => {

            if (!this.validator.validateAbout(fields.nick)) {
                next(new ErrorResponse(9127, "Invalid nick", 400))
                return
            }

            //-> more validations

            try {

                const animalModel = new Animal(
                    generateId(),
                    userId,
                    fields.nick,
                    fields.chip,
                    fields.age,
                    fields.gender,
                    fields.about,
                    fields.vaccines,
                    files
                )

                const animal = await this.animalDatabase.createAnimal(animalModel)

                if (animal instanceof Error) {
                    next(new ErrorResponse(3121, animal.message, 500))
                    return
                }

                // Success
                response.json(animal)

            } catch (error: any) {
                next(new ErrorResponse(3122, error.message, 500))
            }

        })
    }
}

[GrosSacASac]

At the end of the form.parse callback delete the files if there was at least 1 error